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1 | /* | |
2 | Chrysalis Web Framework [http://chrysalis.sourceforge.net] | |
3 | Copyright (c) 2002, 2003, 2004, Paul Strack | |
4 | ||
5 | All rights reserved. | |
6 | ||
7 | Redistribution and use in source and binary forms, with or without | |
8 | modification, are permitted provided that the following conditions are met: | |
9 | ||
10 | 1. Redistributions of source code must retain the above copyright notice, this | |
11 | list of conditions and the following disclaimer. | |
12 | ||
13 | 2. Redistributions in binary form must reproduce the above copyright notice, | |
14 | this list of conditions and the following disclaimer in the documentation | |
15 | and/or other materials provided with the distribution. | |
16 | ||
17 | 3. Neither the name of the copyright holder nor the names of its contributors | |
18 | may be used to endorse or promote products derived from this software without | |
19 | specific prior written permission. | |
20 | ||
21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
22 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
23 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | |
25 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
26 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
27 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
28 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
29 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
31 | */ | |
32 | ||
33 | package org.chwf.taglib.ji18n; | |
34 | ||
35 | import java.io.IOException; | |
36 | import java.util.Arrays; | |
37 | import java.util.HashSet; | |
38 | import java.util.Locale; | |
39 | import java.util.Set; | |
40 | ||
41 | import javax.servlet.http.HttpServletRequest; | |
42 | import javax.servlet.jsp.JspException; | |
43 | import javax.servlet.jsp.JspWriter; | |
44 | ||
45 | import org.chwf.i18n.UserLocale; | |
46 | import org.chwf.taglib.base.LifeCycleTagSupport; | |
47 | import org.chwf.taglib.base.TagException; | |
48 | ||
49 | /** | |
50 | * Tag handler for the <code><url></code> tag. | |
51 | * | |
52 | * @author <a href="mailto:pfstrack@users.sourceforge.net">Paul Strack</a> | |
53 | */ | |
54 | 7 | public class UrlTag extends LifeCycleTagSupport { |
55 | ||
56 | /** Value for i18n attribute to localize by language. */ | |
57 | public static final String LANGUAGE = "LANGUAGE"; | |
58 | ||
59 | /** Value for i18n attribute to localize by country. */ | |
60 | public static final String COUNTRY = "COUNTRY"; | |
61 | ||
62 | /** Array of i18n options. */ | |
63 | 2 | private static final String[] OPTIONS_ARRAY = { LANGUAGE, COUNTRY }; |
64 | ||
65 | /** Set of i18n options. */ | |
66 | 1 | private static final Set OPTIONS = new HashSet(Arrays.asList(OPTIONS_ARRAY)); |
67 | ||
68 | /** The url value. */ | |
69 | private String value; | |
70 | ||
71 | /** Whether to include the country. */ | |
72 | private String i18n; | |
73 | ||
74 | /** | |
75 | * Clean up data for tag handler reuse and pooling. Should be overridden in | |
76 | * tag handler. Subclasses should always invoke their superclass's cleanup | |
77 | * method: <code>super.cleanup()</code> | |
78 | */ | |
79 | public void cleanup() { | |
80 | 1 | super.cleanup(); |
81 | 1 | this.value = null; |
82 | 1 | this.i18n = null; |
83 | 1 | } |
84 | ||
85 | /** | |
86 | * The url value. | |
87 | * | |
88 | * @param value The url value. | |
89 | */ | |
90 | public void setValue(String value) { | |
91 | 5 | this.value = value; |
92 | 5 | } |
93 | ||
94 | /** | |
95 | * The url value. | |
96 | * | |
97 | * @return The url value. | |
98 | */ | |
99 | public String getValue() { | |
100 | 5 | return this.value; |
101 | } | |
102 | ||
103 | /** | |
104 | * Whether localize by language or country. | |
105 | * | |
106 | * @param i18n Whether localize by language or country. | |
107 | * @throws JspException If attribute is assigned an illegal value. | |
108 | */ | |
109 | public void setI18n(String i18n) throws JspException { | |
110 | 3 | if (!OPTIONS.contains(i18n)) { |
111 | 0 | Object[] args = { i18n }; |
112 | 0 | throw new TagException(Ji18nMessages.MESSAGE_ILLEGAL_I18N_OPTION, args); |
113 | } | |
114 | 3 | this.i18n = i18n; |
115 | 3 | } |
116 | ||
117 | /** | |
118 | * Whether localize by language or country. | |
119 | * | |
120 | * @return Whether localize by language or country. | |
121 | */ | |
122 | public String getI18n() { | |
123 | 1 | return i18n; |
124 | } | |
125 | ||
126 | /** | |
127 | * Wraps the (trimmed) tag body with the defined element. | |
128 | * | |
129 | * @return EVAL_PAGE | |
130 | * @throws IOException For write errors. | |
131 | */ | |
132 | public int doEnd() throws IOException { | |
133 | 3 | printLocalizedURL(); |
134 | 3 | return EVAL_PAGE; |
135 | } | |
136 | ||
137 | /** | |
138 | * Print the localicalize URL. | |
139 | * | |
140 | * @throws IOException For I/O errors. | |
141 | */ | |
142 | private void printLocalizedURL() throws IOException { | |
143 | 3 | JspWriter out = pageContext.getOut(); |
144 | 3 | String src = getValue(); |
145 | ||
146 | 3 | if (src.startsWith("/")) { |
147 | 3 | out.print(getContextPath()); |
148 | } | |
149 | ||
150 | 3 | if ((this.i18n != null) && (src.lastIndexOf('/') < src.lastIndexOf('.'))) { |
151 | 2 | Locale locale = UserLocale.getLocale(); |
152 | 2 | int lastPeriod = src.lastIndexOf('.'); |
153 | ||
154 | 2 | out.print(src.substring(0, lastPeriod)); // Up to '.' |
155 | 2 | out.print('_'); |
156 | 2 | out.print(locale.getLanguage()); |
157 | 2 | if (useCountry(locale)) { |
158 | 1 | out.print('_'); |
159 | 1 | out.print(locale.getCountry()); |
160 | } | |
161 | 2 | out.print(src.substring(lastPeriod)); // From '.' onward |
162 | } else { | |
163 | 1 | out.print(src); |
164 | } | |
165 | 3 | } |
166 | ||
167 | /** | |
168 | * Returns true if locale has a country. | |
169 | * | |
170 | * @param locale The locale. | |
171 | * @return true if locale has a country. | |
172 | */ | |
173 | private boolean useCountry(Locale locale) { | |
174 | 2 | if ((this.i18n == null) || (!this.i18n.equals(COUNTRY))) { |
175 | 1 | return false; |
176 | } | |
177 | 1 | return (locale.getCountry() != null) && (!locale.getCountry().equals("")); |
178 | } | |
179 | ||
180 | /** | |
181 | * Get the context path. | |
182 | * | |
183 | * @return The context path. | |
184 | */ | |
185 | private String getContextPath() { | |
186 | 3 | HttpServletRequest request = (HttpServletRequest) pageContext.getRequest(); |
187 | 3 | return request.getContextPath(); |
188 | } | |
189 | } |
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